This needs it’s own post: Dockerfile Best Practices

Of note:

Always use the array syntax when using CMD and ENTRYPOINT.

If you use the … syntax without the array, docker prepends /bin/sh -c to your command.


So that means that if you want to say, run something like a shell script that invokes processes, you need to wrap that ENTRYPOINT in an array. Even if it’s just a singleton.

The entire article is a good read, it resolved a few niggles I was having.